Chelsea only managed a draw at home against Bolton and are now five-points behind Manchester United in the Premiership.
Mourinho said: “It is not over because mathematically there is a chance.
“When the chance is there, we have to believe. But it is almost lost, almost. They have to lose two games and we have to win all three. They are very close.”
He continued: “It was an emotional game, although it did not have much quality.
“There was maybe a bit too much emotion on our part, but there was a lot of heart.
“We put them under pressure and we were close to getting a third goal.”
